- Mayumi Tanaka (Monkey D. Luffy (voice))
- Kazuya Nakai (Roronoa Zoro (voice))
- Mari Yaguchi (Yoko (voice))
- Akemi Okamura (Nami (voice))
- Kappei Yamaguchi (Usopp (voice))
- Hiroaki Hirata (Sanji (voice))
- Ikue Otani (Tony Tony Chopper (voice))
- Yuriko Yamaguchi (Nico Robin (voice))
- Kazuki Yao (Franky (voice))
- Katsuhisa Houki (Jinbe (voice))
- Cho (Brook (voice))
- Hideyuki Tanaka (Donquixote Doflamingo (voice))
One Piece — S16E675
Episode: A Fateful Encounter! Kyros and King Riku!
Air Date: 2014-12-21
Runtime: 24 min
Overview
Usopp runs into trouble in his battle with Treebol, and flashback sheds light on how a young Kyros made the shocking transition from murderer to one of King Riku's most trusted men.